The threesome of Masters champion Sergio Garcia, Jason Day and Texan Patrick Reed highlight the groupings for this week's AT&T Byron Nelson in Irving, Texas.

Garcia, the defending champion at the Nelson, Day and Reed tee off at 1:50 p.m. (EST) Thursday to begin their opening round. World No. 1 Dustin Johnson, Louis Oosthuizen, and Dallas native and former Texas Longhorns golfer Cody Gribble, are in the group before, teeing off at 1:40 p.m.

Likely the most popular Texan in the field, Jordan Spieth, starts his first round at 8:50 a.m. off the 10th tee with Brandt Snedeker and Matt Kuchar. They'll tee off after Jason Dufner, Brooks Koepka and Ian Poulter (8:40 a.m.).